1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
// Copyright (c) 2010 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// stackwalker.cc: Generic stackwalker.
//
// See stackwalker.h for documentation.
//
// Author: Mark Mentovai
#include <cassert>
#include "google_breakpad/processor/stackwalker.h"
#include "google_breakpad/processor/call_stack.h"
#include "google_breakpad/processor/code_module.h"
#include "google_breakpad/processor/code_modules.h"
#include "google_breakpad/processor/minidump.h"
#include "google_breakpad/processor/source_line_resolver_interface.h"
#include "google_breakpad/processor/stack_frame.h"
#include "google_breakpad/processor/symbol_supplier.h"
#include "processor/linked_ptr.h"
#include "processor/logging.h"
#include "processor/scoped_ptr.h"
#include "processor/stackwalker_ppc.h"
#include "processor/stackwalker_sparc.h"
#include "processor/stackwalker_x86.h"
#include "processor/stackwalker_amd64.h"
#include "processor/stackwalker_arm.h"
namespace google_breakpad {
Stackwalker::Stackwalker(const SystemInfo *system_info,
MemoryRegion *memory,
const CodeModules *modules,
SymbolSupplier *supplier,
SourceLineResolverInterface *resolver)
: system_info_(system_info),
memory_(memory),
modules_(modules),
resolver_(resolver),
supplier_(supplier) {
}
bool Stackwalker::Walk(CallStack *stack) {
BPLOG_IF(ERROR, !stack) << "Stackwalker::Walk requires |stack|";
assert(stack);
stack->Clear();
// Begin with the context frame, and keep getting callers until there are
// no more.
// Take ownership of the pointer returned by GetContextFrame.
scoped_ptr<StackFrame> frame(GetContextFrame());
while (frame.get()) {
// frame already contains a good frame with properly set instruction and
// frame_pointer fields. The frame structure comes from either the
// context frame (above) or a caller frame (below).
// Resolve the module information, if a module map was provided.
if (modules_) {
const CodeModule *module =
modules_->GetModuleForAddress(frame->instruction);
if (module) {
frame->module = module;
if (resolver_ &&
!resolver_->HasModule(frame->module) &&
no_symbol_modules_.find(
module->code_file()) == no_symbol_modules_.end() &&
supplier_) {
string symbol_data, symbol_file;
SymbolSupplier::SymbolResult symbol_result =
supplier_->GetSymbolFile(module, system_info_,
&symbol_file, &symbol_data);
switch (symbol_result) {
case SymbolSupplier::FOUND:
resolver_->LoadModuleUsingMapBuffer(frame->module,
symbol_data);
break;
case SymbolSupplier::NOT_FOUND:
no_symbol_modules_.insert(module->code_file());
break; // nothing to do
case SymbolSupplier::INTERRUPT:
return false;
}
}
resolver_->FillSourceLineInfo(frame.get());
}
}
// Add the frame to the call stack. Relinquish the ownership claim
// over the frame, because the stack now owns it.
stack->frames_.push_back(frame.release());
// Get the next frame and take ownership.
frame.reset(GetCallerFrame(stack));
}
return true;
}
// static
Stackwalker* Stackwalker::StackwalkerForCPU(
const SystemInfo *system_info,
MinidumpContext *context,
MemoryRegion *memory,
const CodeModules *modules,
SymbolSupplier *supplier,
SourceLineResolverInterface *resolver) {
if (!context) {
BPLOG(ERROR) << "Can't choose a stackwalker implementation without context";
return NULL;
}
Stackwalker *cpu_stackwalker = NULL;
u_int32_t cpu = context->GetContextCPU();
switch (cpu) {
case MD_CONTEXT_X86:
cpu_stackwalker = new StackwalkerX86(system_info,
context->GetContextX86(),
memory, modules, supplier,
resolver);
break;
case MD_CONTEXT_PPC:
cpu_stackwalker = new StackwalkerPPC(system_info,
context->GetContextPPC(),
memory, modules, supplier,
resolver);
break;
case MD_CONTEXT_AMD64:
cpu_stackwalker = new StackwalkerAMD64(system_info,
context->GetContextAMD64(),
memory, modules, supplier,
resolver);
break;
case MD_CONTEXT_SPARC:
cpu_stackwalker = new StackwalkerSPARC(system_info,
context->GetContextSPARC(),
memory, modules, supplier,
resolver);
break;
case MD_CONTEXT_ARM:
cpu_stackwalker = new StackwalkerARM(system_info,
context->GetContextARM(),
memory, modules, supplier,
resolver);
break;
}
BPLOG_IF(ERROR, !cpu_stackwalker) << "Unknown CPU type " << HexString(cpu) <<
", can't choose a stackwalker "
"implementation";
return cpu_stackwalker;
}
bool Stackwalker::InstructionAddressSeemsValid(u_int64_t address) {
const CodeModule *module = modules_->GetModuleForAddress(address);
if (!module) {
// not inside any loaded module
return false;
}
if (!resolver_ || !supplier_) {
// we don't have a resolver and or symbol supplier,
// but we're inside a known module
return true;
}
if (!resolver_->HasModule(module)) {
string symbol_data, symbol_file;
SymbolSupplier::SymbolResult symbol_result =
supplier_->GetSymbolFile(module, system_info_,
&symbol_file, &symbol_data);
if (symbol_result != SymbolSupplier::FOUND ||
!resolver_->LoadModuleUsingMapBuffer(module,
symbol_data)) {
// we don't have symbols, but we're inside a loaded module
return true;
}
}
StackFrame frame;
frame.module = module;
frame.instruction = address;
resolver_->FillSourceLineInfo(&frame);
// we have symbols, so return true if inside a function
return !frame.function_name.empty();
}
} // namespace google_breakpad
|
